Janay Mcfarlane was shot once in the head around 11:30 p.m. Friday in North Chicago, Lake County Coroner Thomas Rudd told the Chicago Sun-Times…Mcfarlane, a mother of a 3-month-old boy, was in the Chicago suburb visiting friends and family…

Hours earlier, Mcfarlane’s 14-year-old sister was feet from Obama at Hyde Park Career Academy, where he spoke about gun violence and paid tribute to Hadiya Pendleton, the 15-year-old honor student fatally shot last month in a South Side park. Police have said it was a case of mistaken identity, and two people have been charged.

Pendleton’s death was one of more than 40 homicides in Chicago in January, a total that made it the deadliest January in the city in more than a decade. Pendleton, a drum majorette, had recently performed during Obama’s inauguration and the slaying happened about a mile from his Chicago home.